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Sony's ZR Series XM-ZZR3301 amplifier features technology that'll help your music play cleanly, loudly, and without distortion. Active Thermal Control regulates the amp's internal temperature to prevent overheating, so your music won't shut down. The Dynamic Distortion Suppressor kicks in at higher volume levels to minimize harmonic distortions, so your bass stays clean.

This sharp-looking Sony delivers up to 600 watts RMS to your subs, so you will be feeling to your music. The low-pass filter optimizes your sub's performance, sending it the frequencies that make it sound its best in your enclosure. The bass boost adds extra kick to your bass-heavy tracks, while the subsonic filter blocks ultra-low frequencies that your subs struggle to reproduce.

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

LED: The
amplifier has an LED strip on the top panel that glows blue when the amp
is on. There is also an LED on the front panel that lights in green when the amp is on and red when the protection circuit is activated.

Low-pass Filter: The XM-ZZR3301
is equipped with a low-pass filter, continuously variable from 50-300 Hz, with a
slope of 12 dB/octave. It is constantly active (cannot be switched off).

Subsonic Filter: The amp has a built-in subsonic filter, which eliminates extremely low frequencies which can rob power and cause damage to the speakers. The subsonic filter is variable
between 6 and 70 Hz, with a slope of 12 dB per octave. Like the low-pass filter, the subsonic filter is constantly active.

Bass Boost: For added low
frequency performance, the amplifier has a bass boost
centered at 40 Hz, variable from 0 to 10 dB.

Terminal Cover: The XM-ZZR3301
comes with a rubber protective cap that slips over the power wire terminal strip to
help prevent accidental short circuiting.

Inputs and Outputs
Notes

Speaker Outputs: Although this
is a mono amplifier, there are screw terminals for two speakers (each terminal
is 0.35" wide). They are not stereo outputs, but summed (L+R) mono, and
internally wired in parallel. If you connect two 4-ohm speakers to the amp, the
amplifier will see a 2-ohm load.

Power/Ground Terminals: The
power and ground screw terminals are 0.54" wide to easily accommodate 4-gauge
wire.

Remote Terminal: The remote
turn on screw terminal is 0.35" wide. Note: If you are connecting the amplifier to a head unit that does not have a remote output, and the speaker-level input harness is used, the
connection to the remote terminal does not need to be made. The amplifier will turn on when a high-level input signal is detected.

Speaker-level Input Harness:
The amp comes with a speaker-level input harness with a 4-pin Molex plug. This allows you to easily connect the amplifier to a factory radio or
a receiver without preamp outputs.

Preamp Output: This amplifier
includes a stereo preamp output, which allows you to send an unfiltered signal
to another amplifier. Note that you
must be using the line level input, not the speaker-level input, in order to use
the preamp output jacks.

Specifications

CEA-2006 Compliance: The
specifications given by Sony for the XM-ZZR3301 amplifier comply with the new
CEA-2006 Amplifier Power Standard from the CEA (Consumer Electronics
Association). All manufacturers who comply with the standard can display the
CEA-2006 logo on their product.

Minimum Impedance: The amplifier's minimum impedance is 2
Ohms.

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raw power

Written By Sam L, Kissimmee , FL on Saturday, February 08, 2014

I've had this amp for a year now and I haven't had any issues with it. ended up buying new speakers cause I blew my old ones. definitely get a capacitor if your going to push this amp hard, I have an optima redtop in a 02 maxima and had to get a capacitor..

Great Amp! A must buy!

I recently purchased this amp after my 900watt Kenwood amp fired. I have got to say you will be suprised on how hard it maintains and puts out GREAT bass to my 2 10' Alpine Type R's. I honestly was thinking that this would not put out as much bass as my 900watt Kenwood amp did but it went above and beyond. A great buy for the price you cant beat it. Thanks Crutchfield for helping me decide on the right amp and subwoofers! 5/5 MUST BUY!

Great Mono Amp

Written By Drew, Newport News, VA on Thursday, August 12, 2010

I recently purchased this amp to upgrade my old 300 watt alpine mono amp. Delivers enough power to push my 2x12" Kicker Comp CVRs hard. Provides clean bass and enormous power at a low price. I definitely recommend this amplifier, it has been great.

Sounds great, very powerful

Written By mikechicago, Chicago, IL on Friday, July 02, 2010

I've heard many people say that sony car audio isn't too good but i prefer to see things to believe it. and im glad i tested it for myself because this amp is great Ive got 2 12" kenwoods in a sealed box and it realy pounds. All in all a great buy.

Really Good!!

Written By Ben, Lexington,SC on Thursday, December 10, 2009

This is a really great amp with plenty of power, at least for my subs, and it looks sexy!! Very impressed with Sony and their product. Also feels very very durable and was very cheap. I got it hooked up to two sony xplod subs and it pounds the heck out of em! Amazing amp and I would recommend the xsl124p5b subs as well.